package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishorFlavorService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishorFlavorServiceImpl implements DishorFlavorService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;


    @Override
    @Transactional
    public void save(DishDTO dishDTO) {

        //插入菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取插入后的id
        Long dishId = dish.getId();
        //插入到每个菜品实体上
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否停售
        for(Long id : ids){
            Dish dish= dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否和套餐关联
        List<Long> setmealIds = setMealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!= null && setmealIds.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品
        //删除口味
//       for(Long id : ids){
//           dishMapper.deleteById(id);
//           dishFlavorMapper.deleteByDishId(id);
//       }

        //优化一条sql
        dishMapper.deleteBatchbyId(ids);
        dishFlavorMapper.deleteBatchByDishId(ids);
    }

    @Override
    public DishVO getById(Long id) {
        DishVO dishVO = new DishVO();
        Dish dish = dishMapper.getById(id);
        BeanUtils.copyProperties(dish,dishVO);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateDishWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //删除当前菜品的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.updateStatus(dish);
    }

    @Override
    public List<Dish> list(DishDTO dishDTO) {
        Dish dish = new Dish();
        dish.setStatus(StatusConstant.ENABLE);
        BeanUtils.copyProperties(dishDTO,dish);
        List<Dish> list = dishMapper.list(dish);
        return list;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
